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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\Files_Trashbin\Controller;
use OCA\Files_Trashbin\Trash\ITrashManager;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\Attribute\NoAdminRequired;
use OCP\AppFramework\Http\Attribute\NoCSRFRequired;
use OCP\AppFramework\Http\Attribute\OpenAPI;
use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Http\FileDisplayResponse;
use OCP\AppFramework\Utility\ITimeFactory;
use OCP\Files\Folder;
use OCP\Files\IMimeTypeDetector;
use OCP\Files\IRootFolder;
use OCP\Files\NotFoundException;
use OCP\IPreview;
use OCP\IRequest;
use OCP\IUserSession;
#[OpenAPI(scope: OpenAPI::SCOPE_DEFAULT)]
class PreviewController extends Controller {
public function __construct(
string $appName,
IRequest $request,
private IRootFolder $rootFolder,
private ITrashManager $trashManager,
private IUserSession $userSession,
private IMimeTypeDetector $mimeTypeDetector,
private IPreview $previewManager,
private ITimeFactory $time,
) {
parent::__construct($appName, $request);
}
/**
* Get the preview for a file
*
* @param int $fileId ID of the file
* @param int $x Width of the preview
* @param int $y Height of the preview
* @param bool $a Whether to not crop the preview
*
* @return Http\FileDisplayResponse<Http::STATUS_OK, array{Content-Type: string}>|DataResponse<Http::STATUS_BAD_REQUEST|Http::STATUS_NOT_FOUND, list<empty>, array{}>
*
* 200: Preview returned
* 400: Getting preview is not possible
* 404: Preview not found
*/
#[NoAdminRequired]
#[NoCSRFRequired]
public function getPreview(
int $fileId = -1,
int $x = 32,
int $y = 32,
bool $a = false,
) {
if ($fileId === -1 || $x === 0 || $y === 0) {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
try {
$file = $this->trashManager->getTrashNodeById($this->userSession->getUser(), $fileId);
if ($file === null) {
return new DataResponse([], Http::STATUS_NOT_FOUND);
}
if ($file instanceof Folder) {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
$pathParts = pathinfo($file->getName());
$extension = $pathParts['extension'] ?? '';
$fileName = $pathParts['filename'];
/*
* Files in the root of the trashbin are timetamped.
* So we have to strip that in order to properly detect the mimetype of the file.
*/
if (preg_match('/d\d+/', $extension)) {
$mimeType = $this->mimeTypeDetector->detectPath($fileName);
} else {
$mimeType = $this->mimeTypeDetector->detectPath($file->getName());
}
$f = $this->previewManager->getPreview($file, $x, $y, !$a, IPreview::MODE_FILL, $mimeType);
$response = new FileDisplayResponse($f, Http::STATUS_OK, ['Content-Type' => $f->getMimeType()]);
// Cache previews for 24H
$response->cacheFor(3600 * 24);
return $response;
} catch (NotFoundException $e) {
return new DataResponse([], Http::STATUS_NOT_FOUND);
} catch (\InvalidArgumentException $e) {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
}
}
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